Enhancement of bloody fingerprints on non-porous surfaces using Lac dye (Laccifer lacca)

Chingthongkham, Phawadol; Chomean, Sirinart; Suppajariyawat, Praew; Kaset, Chollanot

doi:10.1016/j.forsciint.2019.110119

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…Lac 染料是 Chingthongkham 等 [41] 图 4 Lac 染色过程示意图 [41] Figure 4 Purposed of bloody fingermark stained with Lac dye [41] .…”

Section: 酸性黄mentioning

confidence: 99%

Research progress in techniques for blood fingermark detection

Peng,

Zhang,

Zhang

2024

Sci. Sin.-Chim

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Blood fingermark, as a common piece of evidence at crime scenes, plays an important role in personal recognition, crime scene reconstruction, and criminal investigation. In recent years, with the deep integration of blood fingermark detection and new reagents, advanced materials, modern analytical methods as well as immunological techniques, the sensitivity, specificity, contrast and applicability of blood fingermark detection have been continuously improved. Moreover, greater breakthroughs have been made in the analysis of endogenous and exogenous fingermark components, the compatibility of touch DNA, and identification of fingermark aging time. This paper outlines the research progress of blood fingermark detection technology both domestically and internationally, which includes not only traditional chemical reagents based on the mechanism of haem catalysis, protein staining and amino acid reaction, but also emerging methods based on novel materials and devices. A brief analysis of the advantages and disadvantages of each method is discussed, and finally, a prospective outlook is presented on the challenges and future prospects of existing techniques, aiming to offer guidance for scholars and practitioners in forensic science.

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“…Lac 染料是 Chingthongkham 等 [41] 图 4 Lac 染色过程示意图 [41] Figure 4 Purposed of bloody fingermark stained with Lac dye [41] .…”

Section: 酸性黄mentioning

confidence: 99%

Research progress in techniques for blood fingermark detection

Peng,

Zhang,

Zhang

2024

Sci. Sin.-Chim

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“…Preliminary/Pilot studies – Various new reagents or approaches were proposed to detect blood marks on non-porous substrates: conjugated cationic polymers in solution [ 390 ], cotton pads soaked with blood reagents [ 438 ] or with a fluorescent amino-functionalized conjugated polymer [ 439 ], Laccifer lacca in solution [ 440 ], phenolic ligands chelated with metal ions [ 395 ], and silica nanoparticles suspended in ethanol [ 359 ]. Acidified hydrogen peroxide combined with 5-sulfosalicylic acid was shown to induce photoluminescence of blood on various porous and non-porous substrates [ 441 ].…”

Section: Fingermark Visualisationmentioning

confidence: 99%

Interpol review of fingermarks and other body impressions (2019 – 2022)

Bécue

Champod

2023

Forensic Science International: Synergy

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“…Contrary to NIN, neither Genipin nor Lawsone enabled visualisation of blood fingermarks on the different paper types. A recent study investigated the use of another natural substance namely laccifer laca, also known as lac dye (which derives from resin extracted from the lac insect; native to Southeast Asia), utilised to enhance blood fingermarks on a range of different porous and non-porous surfaces in comparison with reference marks enhanced with AB-1(Chingthongkham et al 2019). The results indicated that Lac dye and AB-1 showed similarity in their enhancement capability on non-porous surfaces in terms of the colour grade and ridge detail that could be observed.…”

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confidence: 99%

Refinement and validation of multi-source blood detection for operational use.

Kennedy¹

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The operational deployment of any technique in forensic casework must undergo thorough investigation of its capabilities and limitations. At Sheffield Hallam University for the past 14 years, the Francese Group have focused on developing the utilisation of Matrix Assisted Laser Desorption Ionisation Mass Spectrometry (MALDI MS) for forensic applications. Not only has this technique shown potential in several different areas (MALDI MS analysis of latent fingermarks, condom lubricants and drug detection in fingermarks and hair as some examples), also being deployed in casework, but in more recent years, the detection of blood also. The end users, namely police and forensic providers have shaped the programme of work on blood detection by letting priorities and needs drive the research. The validation studies conducted in this thesis offer evidence of robustness and versatility as well as further insights as to what circumstances MALDI MS would be most suited/needed for the investigation of blood at a sceneof a violent crime. Currently, crime scene investigators (CSI) and crime labs employ commercially available presumptive tests for the detection of blood when recovered from crime scenes. However, these tests are not specific and occasionally yield false positives. Furthermore, confirmatory testing is not routinely performed. The risk of a false positive result could potentially result in a wrongful conviction or dismissal in court and brings into question the validity of these tests when their findings are heavily relied on in judicial proceedings. The utilisation of MALDI MS Profiling (MSP) and MS Imaging (MSI) for the rapid and informative detection of blood in this thesis has shed light on the multiplex nature of this alternative approach. A great deal of the work presented has shown the capability to not only distinguish between human and animal blood, but to determine blood provenance down to the species level (Chapter 2). In terms of animal blood detection, even more intelligence has been gained within this strand of the project, highlighting that a distinction can be made between intravenous animal blood and traces of animal blood from packaged meat (Chapter 4). If animal blood was detected at a crime scene, being able to offer insight on the manner in how the blood was shed could offer considerable assistance in reconstructing the dynamics of the crime. The compatibility and robustness testing performed in this project, which has been demonstrated across several strands of the project (Chapters 2,3 and 5) has additionally shown that MALDI MS can be used in conjunction with several blood enhancement techniques (BET), deposition surfaces, in the co-presence of other biofluids, and in tandem with DNA typing post MALDI MSI analysis. This body of knowledge significantly contributes to further advance implementation of MALDI based approaches for the forensic analysis of blood in stains and fingermarks in an operational environment and to the further promotion of MALDI as a Category A technique in the Home Office Fingermark Visualisation Manual after its recent promotion to Category B.

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Enhancement of bloody fingerprints on non-porous surfaces using Lac dye (Laccifer lacca)

Cited by 8 publications

References 15 publications

Research progress in techniques for blood fingermark detection

Research progress in techniques for blood fingermark detection

Interpol review of fingermarks and other body impressions (2019 – 2022)

Refinement and validation of multi-source blood detection for operational use.

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